days of the week are astrological constructs, a psychological operation.

monday (lundi) - moon day tuesday (mardi) - mars day wednesday (mercredi) - mercury day thursday (jeudi) - jupiter day friday (vendredi) - venus day saturday - saturn day sunday - sun day

that said, sunday is my favorite, both astrologically and workflow-wise. we get to plan for success in the next 7 days. visiting a church on that day is great too. but you know what? the sun comes up every day, and any day is a good day to visit the church.